I'm 23, 5'4, 112 pounds. Medical history: I have IBS, TMJ and had appendectomy in 05. I have a very sensitive roof of my mouth- tends to get blisters behind my teeth from hot (but not scalding) liquid- which I think may be from a past burn to the mouth, but today (and had this before too) it feels like the very centre of the roof of my mouth is rough, sore and raised and it hurt when I ate fruit.